When I was there in the fall of 1967 it wasn't called the Missionary Training Center, it was the Language Training Mission.
These days all the missionaries pass through the MTC, but then you got one week's worth of training in Salt Lake and if you were going to an English-speaking mission, or there was no language training for your mission, you just left after the one week.
The LTM was in a building called Knight-Magnum hall, on the very south-eastern corner of campus. It had been a residence hall (dorm) in it's day, but didn't have enough living space for all the missionaries being trained, as there had to be classrooms. So my district lived around the corner in a house on 9th East.
Well, my group got to spend Christmas in the mission field, but Thanksgiving in the LTM.
We had sloppy-joes.